Class: ViewModels::Extensions::ModelReader::FilteredDelegationInstaller

Inherits:

Object

• Object
• ViewModels::Extensions::ModelReader::FilteredDelegationInstaller

show all

Defined in:

lib/view_models/extensions/model_reader.rb

Overview

Instance Attribute Summary (collapse)

• - (Object) attributes readonly

  The attributes target, attributes, filters.

• - (Object) filters readonly

  The attributes target, attributes, filters.

• - (Object) target readonly

  The attributes target, attributes, filters.

Instance Method Summary (collapse)

• - (Object) filtered_left_parentheses

  Combines left parentheses and filters.

• - (FilteredDelegationInstaller) initialize(target, options) constructor

  Initialize a new filtered delegation.

• - (Object) install

  Install a reader for each attribute.

• - (Object) install_reader(attribute)

  Install a reader for the given name with the given filters.

• - (Object) left_parentheses

  Generates an array of left parentheses with length <amount of filters>.

• - (Object) reader_definition_for(attribute)

  Defines a reader for the given model attribute and filtering through the given filters.

• - (Object) right_parentheses

  Generates the needed amount of parentheses to match the left parentheses.

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# File 'lib/view_models/extensions/model_reader.rb', line 76

def initialize target, options
  @target, @attributes, @filters = target, *options
end

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# File 'lib/view_models/extensions/model_reader.rb', line 70

def attributes
  @attributes
end

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# File 'lib/view_models/extensions/model_reader.rb', line 70

def filters
  @filters
end

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# File 'lib/view_models/extensions/model_reader.rb', line 70

def target
  @target
end

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# File 'lib/view_models/extensions/model_reader.rb', line 106

def filtered_left_parentheses
  filters.zip(left_parentheses).join
end

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# File 'lib/view_models/extensions/model_reader.rb', line 82

def install
  attributes.each { |attribute| install_reader(attribute) }
end

install_reader :attribute

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# File 'lib/view_models/extensions/model_reader.rb', line 91

def install_reader attribute
  target.class_eval reader_definition_for(attribute)
end

left_parentheses # => ['(', '(', '(', '(']

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# File 'lib/view_models/extensions/model_reader.rb', line 121

def left_parentheses
  ['('] * filters.size
end

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# File 'lib/view_models/extensions/model_reader.rb', line 100

def reader_definition_for attribute
  "def #{attribute}; #{filtered_left_parentheses}model.#{attribute}#{right_parentheses}; end"
end

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# File 'lib/view_models/extensions/model_reader.rb', line 112

def right_parentheses
  ')' * filters.size
end